store and usage of genetic information (nucleus and ribosomes)-DNA replication and gene expression

The nucleus stores DNA, break down DNA to other components.

DNA->chromosomes->chromatin (DNA+Proteins)

*Mitotic chromosome in X shape

*Usual form of chromosome in jumbled mess within nucleus

The Nuclear Envelope encloses the nucleus, what is it made of? Whats its purpose?

Consists of 4 phospholipid bilayers (double membrane)

Nuclear Pores-perferations in the envelope, holes line by proteins-regulate entry/exit

What is the nuclear lamina?

Nuclear Laminia-support/structure for the nucleus, lines nuclear side of envelope Nucleolus-rRNA synthesis, ribosomal subunit assembly, can have more than 1 depending upon the cells numbers of proteins made